Tuesday, 11 September 2007

Bonilla 2007-09-08/09

Following the invitation of Alberto Martos for the last Saturday, I attended to the Mirador de las Estrellas (Google Earth Link). It is the observation area that the Agrupacion Astronomica de Madrid has in Bonilla, Cuenca. There, despite the bad state of the atmosphere, we were able to capture the following images. The first one is centered in the central part of the Andromeda galaxy (M31) and the second one the Hercules Globular Cluster (M13).

Both images were captured using a C8 SCT with a Canon Rebel 400D attached to the primary focus. Using an ISO of 1600, the M31 image was captured with an exposure of 3 minutes and the M13 image with an exposure of 30 seconds. The posprocessing of the first image consisted in a HDR rescaling followed by a median filtering. The second one was produced modifying the histogram levels and aplying a median filtering.